diff --git a/src/Add-on/DrawLine.ts b/src/Add-on/DrawLine.ts
index 094908fae..eaf4ecbdb 100644
--- a/src/Add-on/DrawLine.ts
+++ b/src/Add-on/DrawLine.ts
@@ -232,6 +232,8 @@ export class DrawCircle implements Command
             BasePoint: ptRes.Value,
             Callback: (v) => cir.Radius = v,
         });
+        if (disRes.Status === PromptStatus.OK)
+            cir.Radius = disRes.Value;
         app.m_Database.hm.EndCmd();
     }
 }
diff --git a/src/UI/DynamicPrompt/RealDynamicInput.ts b/src/UI/DynamicPrompt/RealDynamicInput.ts
index 9c6112ed4..24c264f53 100644
--- a/src/UI/DynamicPrompt/RealDynamicInput.ts
+++ b/src/UI/DynamicPrompt/RealDynamicInput.ts
@@ -1,4 +1,7 @@
-import { DynamicInput } from "./DynamicInputBase";
+import { KeyBoard } from '../../Common/KeyEnum';
+import { DynamicInput } from './DynamicInputBase';
+import { DynamicInputManage } from './DynamicInputManage';
+
 const Parser = require('expr-eval').Parser;
 
 //实数输入框
@@ -34,4 +37,16 @@ export class RealDynamicInput extends DynamicInput
         else
             this.inputEl.style.border = "3px solid transparent";
     }
+
+    OnInputKeyDown(e: KeyboardEvent)
+    {
+        super.OnInputKeyDown(e);
+        switch (e.keyCode)
+        {
+            case KeyBoard.Space:
+                DynamicInputManage.GetManage().HandleInputEvent("");
+                e.stopPropagation();
+                break;
+        }
+    }
 }
\ No newline at end of file